morgan



um. 29, 1924.- 1,482,199 V E. C. MORGAN MINING MACHINE -Original FiledMarch 2O 1916 vE3 Sheets-Sheet 5 Jan. 29 1924.

' 1,482,199 E. c. MORGAN MNING MACHINE original Filed MarohogQg). 191esheets-sheet 4 Jan. 29, 1924. 1,482,199

' E. c. MORGAN MINING MACHINE original Filed Marcha). 191e 8sheets-sheet 5 Jan. 29, 1924.

E. C.4 MORGAN MINING MACHINE Original FiledMarch 20. 191e 8 sheets-sheet6 Alan, 29, 1924.

- E. C. MORGAN MINING MACHINE 7 Original Filed March 20. 1916 8Sheets-Sheet '7 Jan. 29, 1924. 1,482,199

'A E. C. GAN

IIIIIIIIIII NE original Filed March 2o. 191e B eeeeeeeeee t 8 PatentedJan. 29, 1924.

UNITED srATEs l 1,482,199 PATENT OFFICE.

EDMUND C. MORGAN, F NEW YORK, N. Y.; OLIVE EUGENIEMORGAN EXECUTRIX OFSAID EDMUND C. MORGAN, DECEASED.

MINING MACHINE.

Application led. March 20, i916, Serial No. 85,243. Renewed January 22,1923.

Re it known that I, Fin-ranno@ Mossen, a citizen of the United States.residing at New York. in the county ot New York and State oli New York7have invented certain new and useful Improvements in Mining Machines. ofwhich the 'following is a speciication.

rlhis invention relates to machines for mining coal and other similarsubstances, and has for its object the provision of a device of thecharacter named which shall loc of improved construction and moree'liicient in its operation than machines of this character heretoforeknown. rl"he invention is exemplified in the combination and thearrangement of parts shown in the accomanying drawings and described inthe folowing specification and it is more `particularly pointed out inthe appended claims.

In the drawings:

Fig. 1 is a diagrammatic plan view ot the machine in operative positionin a mine chamber.

Fig. 2 is a vertical section through a mine chamber representing`diagrammatically the machine in operative position.

Fig. 3 is a side elevation ot the machine as it appears during theprocess of making a cut.

Fig. 4; is a top plan view o' the complete machine and a portion ot aconveyor used in connection therewith.

Fig. 5 is a, fragmentary horizontal sectional view on the level o'lthevlino Iwo ol Fig. 'l but showing parts oit the machine not illustrated inthe latter view.

Fig. e" is an enlarged sectional elevation ot the interior constructiono'l' a planetary gear and brake mechanism shown at 70 in Fig.

Fig. 5b is a sectional elevation of a portion ot' Fig. o to show theplanetary gear connections between the driving mechanism and the wormgearing oit the spaced apart horizontal korf cutters.

Fig. 5c is a tragmentarv sectional elevation to show the connectionsbetween the driving mechanism and the chain core out* ting mechanism.

Fig. 6 is a vertical sectional view on line (36 of Fig. 5.

Fig. 7 is a vertical sectional view on line 7-7 of Fig.

Fig tl is a, section on line BM-8 oli Fig. 6.

Fig. 8a is a detail of a cam action used ttor driving a portion ot themachine.

Fig. 9 is a fragmentary sectional view ol a material moving deviceforming part o'i the invention.

Fig. 10 is a fragmentary sectional vier.v on line 10-10 of Fig. 6.

Fig. 11 is a detail of a part used connection with the screw support forthe ma chine.

Fig. 12 is a horizontal sectional view ot a modified form of theinvention.

Fig. 13 is an elevational view of the forni of the invention shown inFig. 12, and

Fig. 14- is a detail ot a portion of the form of the invention shown inFigs. 12 and 13.

Referring iirst to Figs. 1 to 11 inclusive, the numeral designates asupporting` frame member provided with a base 21 arranged to rest uponthe floor of the mine chamber. as shown in Figs. 2 and. 3. The framemember 2() is also provided with a pair of upright standards 22 providedwith pivot pins 23 at their upper ends. A vertically swinging trame 24sis carried by the pivot pins 23 and comprises a base plate 25 and anupstanding` guard wall 26. The uprights 22 are pr vided at their upperends with internally threaded sleeves 27 in which anchor bars 281 areadjustably secured. The bars 2S are provided at their upper ends withpointed portions [for engaging the roel" ol' the mine chamber and arealso provided with hand wheels 29 ilor adjusting the bars in theirrespective sleeves to torce their pointed ends; into contact with themine root. The base plate oi" the pivoted traine work 24 is provided atits forward end with a circular opening 30. as will be seen from Figs.5. 6. .7 and 8. Projecting inwardly from the periiiherjv of the opening30 is a flange 31 forming a. circular track or slideway 'for thecircular' plate 32 which rests upon the flange 3l and is capable ofrotation thereon. A flat ring is secured to the base plate 25 andoverlaps the edge ol2 the plate 32 to 'torni a guide lor holding theplate 32 in. position. lntegral with the plate 32 and projectingupwardly theretroni in spaced relation from one another near the lirontportion of the plate is a pair of uprights 35 and 36. These uprightshave supports for holding in place the op eratng mechanism for themovable parts of the mining machine. A. vertical sleeve 3T is carried'hy hrachete` 88 and 39 extending; horizontally from the u pripghts 35and 36j the sleeve 37 being positioned centrally over an opening 4() .inthe rotary plate 32. Thil supports 35 and 36 are also provided withupstanding` pedestals (one of which is shown at 42 in Fig. 6), which areprovided with bearings 43 and 44 in which is journaled a. horizontalshaft 45. Carried by the support 35, as shown in. Figs. 4, 5, 6 and T,is a table or platform 46. rllheiv platform 46 has a circular outerperiphery arranged to overlie approximately the outer periphery ot therotary plato 322 its shown in Figs. 6 and 7 the table 46 is providedwith. a laterally extending).4 bracket portion 47 which is provided witha. Collar 48 having an opening therethrough arranged in alignment withthe opening;fr in the sleeve 37. To assist in supporting the collar 48and` the table 4G the bracket 4T. as shown in Fig. 7, is provided withan arm which vis secured to the upright 35'. In tact. the entire'tramework, including; 'the plate 32, the uprights 35 and 36 and thetable 46, constitutes a single integral cast-ing.

The support 21 is provided with a lorwardly projecting' tonpjue 5()having slideways 51 between which mounted a block 52 arranged to movebackwardly and forH wardly between the ways 51. Carried by the block 52is an upright standard 53 which is held in its supporting block hy a pin54. lhile the upright 53 is tree to oscillate about the pin 54 as apivot it is prevented from rotation about its aXis hy this pivot pin.The entire upper portion of the standard 53 is provided withscrewthreads 55. The screw-threaded portions 55 ot the standard 53cooperates with the internally threaded portion ot a worm nut 56 held inplace l'ietwoen the collar 48 and the lower end o'l' the sleeve 3T. Aplate or washer 5T is positioned between the upper surface ot the wormnut 56 and the lower end ot the sleeve 37. This,4 washer, as shown inFig. 11, is held from rotation on the standard 53 by means ot keys 58but is free to slide longitudinally aloiip; the standard. The washer 5?carries :i projection 59 hav-- ing an opening' 69 therein which isprovided with a pin 61 arranged to pass through the openinpj 60 andenter a corresponding` opening' in the upper surface ot the worm nut 56.By means of this pin 61 it is apparent that the worm nut 56 may belocked against rotation on the standard 53. llhen the pin 61 iswithdrawn 'from theopening 62, however, the worm nut 56'1nayy he rotatedto move the traine-work, includingthe sleeve 37, the collar 48, theuprights 35 and 36, the table 46' and all of the parts supported by thisirame-work upwardly or downwardly along the standard: 53.

The medhanism for rotating the worm nut 56 will he best understood byreferring to Figs. 5, 5"", 5b and 6. A motor 65 is mounted on theplatitomi 46 and is provided with a horizontally extending shaft 66which carries .a wormv 6T meshing with a worm wheel 187, shown in Fig.5b connected through the planetary gearingto the worm 68. lonnected tothe worm wheel 187w is a shaft 188 to which is splined the clutchelement 69; and when the clutch element 69 is moved to the lett by meansof' a lever 189, rotary motion is transmitted to the inner spur gear190. The rotation oit the spur gear l-90causes the rotation ol the gears191 and 192 in opposite directions, and theretore causes the latter totravel around the internal gear 193- in the same direction whileoccupying' diametrically opposite positions on the ends of the spider194. This spider' 194' is keyed to the sleeve 195 which in turn isconnectedto the worm 68 so as to rotate the latter whenever said sleeve195 is rotated. lt should be understood, however, that the shat't 188 isnot connected to either the worm (38 or the sleeve 195, but is mountedloosely witl'iin the latter and is connected only to the worm wheel 187and to the clutch element 69. The casing 196 is provided with a hub 197at one side for free rotation on the sleeve 195, and on the other sideHts on the projecting hub 198 of the central gea-r 190. The peripheralsurface of the casing 196constitutes a brake pulley 199, and associatedtherewith is a brake band 200 which is rigidly connected at one, end 201to the standard 202 which is fixed to the base plate 46. The other end,203, ot' the brake band 200 is provided with a screw-threaded openingthrough which eX- tends the screw-threaded rod 204, so that when thelatter is turned by means ot the wheell 205, the lirake band 200 may beapplied to the brake pulley 199- so as lio hold the internal gear 193stationary whenever desired. Vhen the brake hand 200 released, theinternal gear 193 will` be "tree to turn when the clutch 691 is thrownin and power is transmitteil lo the near 190, and therefore no motionwill he transmitted to the worm 68, but when the brake band 200 isapplied', the gear 193 will be held stationary, and then when the clutch69 is thrown in the spider 194 will be rotated andthereby transmitrotary movement to the sleeve 195 and also to the worm. 68 to which thesleeve 195 is connected `tor rotation. ly, itully applying' the brakemechanism, the worm 68 may he given a poweritul rotary movement at acomparatively rapid' rate, but whenthe hrale is partially released so asto permit slipping to a regulated degree, a slower rate of movement-maybe obtained', althoughalso very powerful. The slow and powerfulfeeding-movement ot the cutting; apparatus.

may therefore be repguhixtlnl by the extent to lil() which the brakemechanism is applied. and when the cutting apparatus is to be returnedto initial position, the brake may he fully applied so as to secure themaximum speed ot return movement.

lVhen it is desired to raise or lower the mining` machine the pin 6l iswithdrawn from the opening 62 in the worm nut 36 and the worm nut isdriven by means of the mechanism described. rThe rotation ot the wormnut on the standard 53 will cause the nut to be moved upwardly ordownwardly along the standard, dependinpT on the direction ot rotationot the motor 65. ln this way the miningr machine trame-work may beadjusted vertically to any desired position on the upright It will beseen that the vertical adjustment on the uprifgpjht 53 will produce apivotal movement about the supports 23. This will vary the position otthe lower end ot the standard 53 somewhat causing the block 52 to slideon the guideway 51.

It'the worm nut 56 is locked from rotation on the standard 53 by meansof the washer 57 and pin 61 rotation ot the shaft 63 will no longerrotate the worm nut 56 on the screw 55 but the worm nut will be heldrigidly from rotation since the standard 53 is prevented l'rom rotationby the pivot pin 541-. lVhen the parts are in this relation thereforeoperation ot the motor will cause the worm 68 to walk around theperiphery of the worm nut 56 and carry with it the entire trame work onwhich the worm 68 is mounted. By this method the trame work is rotatedto feed the cuttingr mechanism of the miningmachine into the work, aswill be more fully explained.

Carried by the supports and 36 at the upper and lower portions thereofrespectively, are two bearings 70 and 71. These bearing rings are spliton a line transversely ot the machine and are provided with removableportions. as shown in Fig. 7, and held in place by bolts 72. Thebearings 70 and 71 are each provided with. two separate rings, thelarger one of which, as shown in Fig. 6. is in axial alignment with thesleeve 37. The smaller bearingring of the bearings 70 and 71 is offsetlaterally7 as shown in Fig. 7 and carries a vertical shaft 73. The upperbearing 70. as shown in Fig. '6, is provided with a bushing 74 in whicha hollow drum 75 is journaled tor rotation. The drum 75 carries a spurgear 76 at its lower end and a sprocketjwheel 77 at its upper end. Thelower bearing 71 carries a similar drum 78 which has a spur gear 79 atits upper end and two sprocket wheels 80 and 31 at its lower end. Thevertical shaft 73 (Fig. 7) is provided at its upper end with a pinion 82which meshes with the gear 76 and at its .lower end with a correspondingpinion 83 which meshes with the gear 79. The shaft 73 is driven by aworm wheel 97 (Fig. 3) meshing` with a worm 86 carried on the motorshaft 66. fr clutch 37 7) operated by a lever 88 is provided torconnecting and disconnecting the shaft 73 with the worm wheel 85.

For severine' the material from the mine wall a system ot cutter chainsis provided supported and `guided by a cutter chain frame-work bestillustrated in Figs. L1t 5. and 6. This `trame-work comprises an uprightbar 90 carrying horizontally extendine,r bars 91. and 92 at its upperand lower end. respectively. The rear portion of the upper bar 91 isprovided with a downwardly projecting plate 93 which tits betweenzQjuideways 94- in the upper portion ot the supports 35 and 36. Adownwardly projecting` lug 95 is secured to the lower surface ot theplate 93 and the support; is provided with a cooperating lug 96. Athreaded. rod 97 connects the lugs 95 and 96 and is arranged to adjustthe plate 91 longitudinally relative to the guides 94. In a like mannerthe lower bar 92. as shown in Figs. 6 and 10, is provided with anupwardly extending' lguide plate 98 which fits between guides 99 carriedon the supports 35 and 36. An adjusting screw 100 similar to the screw97 is provided for the lower cutter bar 92. As shown in Figs. 5 and 6.ythe lower cutter bar 92 is provided with a guide iiangre 101. whichextends around the entire outer periphery thereot. cutter chain 103 issupported by the guide liauge 101 on the outer periphery ot the bar 92.The chain 103 at its inner end passes around the sprocket wheel 00 andis driven thereby by means of the Q;ear 79 and shaft 73. lu a similarmanner an upper cutter chain 104l is mounted ou the upper ha r 91 and isdriven by the sprocket wheel 77 supported in the upper hear 70. ll willhe apparent that the entire cutter traine comprisiup' the hars 90, 91and 92 may be moved toward and trom the .sg'irocket wheels 77 and 30 toadjust the tension in the chains 103 and 1011-.

The bars 91 and 92 are each provided with central longitudinal slots 105and 106 respectively. As shown in Fie'. 5 these slots extend throughoutthe Igreat r part et the outer portion oit the bars and are provided atone side thereof with chain `guides 107. vertically evtendinehar 103(Figs. 3 and 5) connects the outer ends ot the horizontal bars 91 and 92and is secured in these bars bv arcuate members 109 'Formingr roundedcorners between the vertical and the horizoi'ital bars. The chain guide107 is continued around the corner inemhers 1 09 and extends verticallyalong` the bar 108. as shown in 5. lin this wav a loop nitride isprovided over which cutter chain 110 passes in the form of ay loopa asshown in Fig. G. Curved corner plates 111 are positioned to guide thechain past the upper and lower ends of the upright 90. From the cornerplates 111 the chain 110 passes inwardly and around a sprocket wheel 112secured to the shaft 15 supported in the bearings 13 and tait. The chainl1() is of sufficient length to permit a slight dip in the loose runthereof above the sprocket wheel 112. This gives the chain a longerbearing on the sprocket wheel and also avoids the necessity forproviding means for adjusting the tension of the chain. The sprocketwheel 112 and the chain 110 are driven by means of a worm 1 '13 securedto the shaft G6. as shown in Fig. 5. A clutch operated by a handle 114.-is provided for making and breaking the driving connection between' theshaft GG and the chain 110.

In Fig. 5'C l have shown a: clutch element 206 splined to the shaft t5so as to be slidable into engagei'n'ent with the clutch element at theouter end of the hub 207 of the worm wheel 208 which meshes with theworm 113 mounted on the shaft 66. The lever 114- may bepivoted at 209 tosuitable brackets 210 extending laterally from the worm gear casing 211.1t will thus be seenv that when the clutch 206 is thrown in by means ofthe lever 1111. motion will be transmitted from` the shaft 66 to theshaft 45 so as to rotate the sprocket wheel 112 shown in Fig. 6, as wellas in Fig. 5.

The arrangement of cutter chains described is especially useful inmining hard material such as hard coal. In mining material of thischaracter some difticulty has been experienced in using a single loopcutter. The present invention overcomes this diiiiculty by providingindependent chains for making the horizontal cuts at the upper and lowerportions of the material being cut. This leaves only the vertical out tobe made by the loop chain since the horizontal portions of this ch aintwill travel in the korf alreadly formed by the horizontal; cutterchains. The particular arrangement of the chains relative to one anothermakes it possible to operate all of the chains by a single operating`mechanism, and to support all of the chains on a single cutter frame. Bythis arrangement the frame may be. made stronger and more e'liic-ientthan would be the case if separatev guide frames were provided for thedifferent machines. rllhe upright con-l nection for guiding the verticalrun of the loop cutter forms a brace for the outer ends of thehorizontal.l cutter arms and the horizontal cutter arms in like mannerform a. substantial support for the horizontal runs of the loop cutter.The cutter chains are fed into the work by the rotary .movement of thecutter head about the support. prolasagne duced by the .rotation of theworm 68 in contact with the worm 5G in the manner ready described. Thecutter is arranged to make a crescent-shape cut in a mine wall, as shownin Figs. 1 and 3.

For the purpose of renioving the coal. severed from the mine wall by thecutter chains novel mechanism is provided, as will be understood byreference to Figs. e, 5, 7, Si" and 9. Supported on the periphery of thetable 116 are a plurality of short pivoted links 120. Pivotally carriedby the outer ends of the links 120 is a vertically extending`horizontally curve/.l guard plate 121` and exten-fling horizontally fromthe lower edge of the plate 121 is an arcuate table 122. The uppersurface of the table 122 is serrated. as shown in Fig. 9, with Vtheteeth of the serrations pointing rearwardly or away from the cutterframe. Mechanism to be described is provided for swinging the table 122on its supporting links 120 to give it a reciprocatory motion toward andaway from` the cutter frame. The driving mechanism is so arranged that aquick movement toward the cutter is produced while the movement awayfrom the cutter is relatively slow. The effect of this reciprocatorymovement will be to slide the table quickly under the material that hasbeen severed by the cutter. the inertia of the severed material hol'dingit in place while the table is moved beneath it. On the slower returnmovement, however. the severed material will be carried back by theserrations on the surface of the table and will be eventually dischargedfrom the table at the rear end thereof. It should be noted that thetable 122 is of less extent angularly than the arc through which thecutter frame travels during a single operation. This feature is de!sirable in order that th-e cutter head1 includving the cutter fra-me andthe table may be swung backwardly a sufficient. amount to, permit thecutter to be properly positioned to begin a cutting operation. lf thetable were made of sumciently angular ext-ent to receive an entiresection severed by a cutting' operation it would be difficult to get thecutter head into its initial position for starting a cutting operationbecause of the fact that the rear end of the table would bel swung intoposition to strike either a part of the machine frame or if the' framewere so designed as to leave a free path for the table the rear end oftheV table would then` swing into position to strik-e the portion of thewall that is severed during the last partV of the cutting operation; Itcan be readily seenv` therefore, that a table of comparative-` todischarge the material as it is severed from the .mine wall and it istherefore not necessary for the table to he of sufficient extent toreceive the entire body of severed material. After the cutter frame andthe table 122 have reached approximately mid position, as shown in F ig.4, the reciprocation of the table may be discontinued, if desired, andthe material severed during the latter port-ion of the cutting operationmay be allowed to remain on the table until the cutter frame is swungbackwardly for a new stroke. 1f this is done the material on the table122 will be carried backwardly at the same time that the cutter frame ismoved to its initial cutting position and the material may then hedischarged into the conveyor at the discharge side of the machine. It isnot .necessary to operate the table in his way, however but thereciprocaring movement may he continued throughout the entire cuttingoperation. If this done a part of the severed material during the latterportion of the cutting operation will be discharged from the table 122at a distance considerably removed from the receiving end of thetransportation conveyor. This material will be picked up, however,during the backward movementof the cutter frame and will then be carriedto a position where it may be discharged on to the transportationconveyor. its previously stated, the worm 681 for rotating the cutterhead about the support may be given either of two operating speeds; theslower speed will be used during the forward movement of the cutterframe and the rapid movement may be used during the return operation.For reciprocating the table 122 a lever 123 is pivotally mounted at 124on the table 46. The outer end of the lever 123 has piivotally securedthereto a link 125 which has one end pivoted to the guard plate 121 at126. The inner end of the lever 123, as shown in Figs. 7 and. 8, isprovided with two prongs 126 and 127. The prong 127 is offset downwardlyand engages a. cani 128 mounted on the vertical shaft 73. The prong 126engages a cam. 129 of a different shape which is integral with the cam128. The cams 128 and 129 are normally free to rotate on the shaft 73but may be clutched thereto by a clutch 128 operated b a handle 129pivotally supported from t e lower surface of the table 46, as shown inFig. 7. A bar 126 is secured to the table 46 and passes over the top ofthe cam 128, as shown in Fig. 7, for preventing upward movement of thecam when the clutch 128 is operated. When the shaft 73 is rotated in aclockwise direction, as viewed in Fig. 8, the forked end of the lever123 wiil be driven by the cam 128 with a comparatively slow movementtothe right during a half revolution of the shaft. On the second part ofthe rotation of the shaft 73, however, the forked end of the lever willbe given a rapid movement in the opposite direc-tion1 being driven bythe cam 129. This produces a rapid forward movement of the table 122which is followed by the slow return movement produced by the cam 128.

To prevent the severed coal from Contact ing with the operatingmechanism a guard wall 130 is positioned at the inner edge of the table122, the wall passing just outside of the upstanding plate 121 to whichthe plate 122 secured. The guard wall 130 has its lower edgesu'iiiciently raised above the base 32 to permit the cutter frame toswing beneath the wall, as shown in Fig. 6. The wall is supported bybrackets 131, 132 and 133, whichy are secured at their rear ends to theupstanding portion of the tilted frame 24 thiiough 'which the pivotalsupporting pin 23 passes, as shown in Fig. 4. The base member 25, asrepresented also in Fig. 4, has a pivoted extension plate 134 and thewall 130 has a` hinged extension 135 which extends over the plate 134and is held in place by a removable link 136. The purpose of theextension is to prevent coal which is severed during the latte-r portionof a eut from falling away from the position it occupied forwardly outof the path of the table 122. The hinged extensions 1,34 and 135 may befolded inwardly to permit easy transportation of the .machine whenoccasion requires.

The.. cutter chains when in operation remove considerable loose materialin the form of coal cuttings or culm and this material is constantlydrawn backwardly by the chains on to the rotary plate 32. In order tocarry this material backwar'dly to a transporting conveyor a chain 137provided with flights 138 passes around the sprocket wheel 81 andextends backwardly as shown in Figs. 5, G and 8, over a guide wheel 139mounted at the rear portion of the machine. As shown inFig. 5 the ring33 is discontinued to form openings 140 through which the chain 137passes. A cover plate 141 is secured to the ring 33 to overlap theopenings through which the chain 137 passes. The rear portion of thebase plate 25 is provided with grooves 142 in which the chain 137travels, and a plate 143 is fastened to the base plate 25 to form acover for the chain 137. The coal cuttings or culm carried backwardly bythe chain 137 is discharged at the end ol the chain into the sameconveyor that carries away the coal from the table 122.

1n order that the base plate of the machine may tit tightly against thesurface of the wall made by the last preceding cut this plate isprovided with an adjustable extenw sion 145 which fits in a groove 146extending along the side edges of the main base plate 25 and the arcuatefront portion thereof` as best shown in Figs 6, 7 and 8. The hinged Fig.8.

' will/first come into contact with the surmachine.

extensien 134 is attached to one side of the adjustable member 145, asShown in Fig. 8. The rearwardly extending arms ot the extension 1:45.are-connected by a cross bar 147 as shown in Fig. .6, and in brokenlines in A spring y1,48 has a plunger 149 which engages the cross bar147 and normally tends to force the plate forwardly. When ,the machineis moved toi-ward to a new position the front edge ot the extension faceformed the last preceding cut and will form a tight connection betweenthe base plate ol.: the mining machine and the mine `wall and preventany particles 0l. coal from dropping downwardly between the wall and theedge yoit the base plate. The spring 148 will hold the plate 145resiliently against the wall and thus provide tor any slight inaccuracyin the positioning of the As shown in Figs. 1 to 4 inclusive, the lowerend of the mining machine trame from which the material is dischargedoverlies the receiving kend oft a conveyorl()` supported for horizontalpivotal movement on a rearwardly extending portion oit the base member`2l. The material as it is carried backwardly and discharged from amining machine is received upon the conveyor 150 which may be driven, asshown in ig. 1, by

a motor 151 and which carries the material to a position to bedischarged into `cars or other transpbrting mechanism. The relationofthe mining machine proper to its conveyor, as indicated in Figs. 1 and2, is such that the conveyormay be swung into various angularhpositionsrelative to the direction ot movement of the mining machine in a minechamber. This enables rthe operator to change the ldirection ot' anentry being driven by the machine without disturbing the relationbetween the machine and the conveyor. For instance, the machine may havebeen previously driving an entry in the direction of the broken lineposition of the conveyor in Fig. 1 and have been changed to thedirection in which the entries were driven with the machine in theposition shownv inthat view. This change in the direction can beaccomplished while the .material continues to be removed along the oldentry, as will be apparent trom an inspection o'fFig. 1,

.lnthemodilication o1:l the invention shown in Figs. 12 to 14Ainclusive, the general construction is similar to that previouslydescribed. In themodiied form, however, the rearend ot' the machine isypivotally carried by sliding blocks carried in upright frame members 161and provided with threaded adjustingrods 162. The threaded rods 162 havebeveled pinions 163 meshing with pinions 164 carried on a horizontalshaft 16.5. The shaft 165 is driven by a motor 166 connected to theshaft through a worm gearing 167. llllhere this construction is used thebrackets .168 which carry the pointed anchor rods for contacting withthe roof of the mine chamber to hold the machine in place are oiiset asshown in Fig. 12 so that the anchor rods will not interfere with thesupport l'or the adjustable pivot. is will be seen trom Fig. 13, whenthis form ot the invention is employed the cutting mechanism may bemoved bodily to its upper position so that the upper cutting chain willcut the coal trom the root oit the mine with a smooth cut in anapproximately horizontal plane instead ot leaving portions ot the coal.adhering to the roof as is done where thc cutting head is tilted about astationary pivot into its upper cutting position.

The table 17() employed in the form shown in Figs. 12 and 13 is slightlydii'erent from that or the other views in that it is not given a shortreciprocatory movement but is ted vforwardly with the cutter frame untila portion of thematerial being severed has become detached trom the minewall. The table is then moved backwardly carrying with it the severedmaterial which is discharged from the table while in its retractedposition. The table is then moved forwardly and receives another portion0f severed material, the operation being repeated as many times as isnecessary to carry back the material severed by a complete cut. Thetable is pivotally connected by an arm 171 to the central verticallyextending sleeve 172 which corresponds to the sleeve 37 ot the 'tornipreviously described. The table is supported beneath the shelt` 173which carries the motor and other operating mechanism in a mannersimilar to that described in connection with the other form ot theinventioi'i. The/arm 171 is held to the lower end ot the sleeve 172 itorpivotal movement thereon by a l'lat ring 174 and lag screws 175. A.threaded standard 176 extends through the sleeve 172 in a mann-ersimilar to the standard 53 in the previously dew scribed form ot theinvention. The inner edge ot the table 170 is provided with a flangering 177 which carries rollers 178 arranged to travel on a tlat ring 179corresponding to the ring oli the previously described form. The ring177 is provided throughout the greater part 0In its length with rackteeth 180 arranged to mesh *withy a pinion 161 driven by a motor 182.`By` means ol this motor and the gearing described the table 170 isoperated for transferring the coal trom its severed position to itsdischarging position. A scraper 183 is provided ttor removingthe coal.from the table 170 as the table ismoved forward at each operation 4'toreceive a new load. This scraper 183 is pivoted at 184 and is providedwith a toe 185 which strikes against teu the abutment plate 186 to limitthe forward movement of said scraper to its full .line position shown inFig. l2. The scraper is free to be swung backward by the backwardlymoving load, but when the latter starts forward again the scraper 183automatically engages the load and prevents it from moving forward withthe rotary carrier 170. ln the next retraction of the latter with a loadthe previous load is pushed along into the hopper and onto the pivotedrear conveyor.

l claim:

l. ln a mining machine, the combination with a main supporting frame, ofa supplemental frame pivotally connected at its rear portion to saidmain frame in a relatively low position, means mounted on the forwardend of said supplemental frame for dislodging material from an upriffhtmine wall, a supplemental support connected to said supporting frame inposition to extend forwardly therefrom along the door of the minechamber, means connected between such ilf'orward extension and saidsupplemental frame for assisting in supporting the latter, and means foradjusting the height of said adjusting mechanism by swinging saidsupplemental iframe on its pivotal support relatively to said mainframe.

2. The combination with a supporting frame having a narrow forwardextension at its lower portion, of a mining machine pivotally connectedat its rear portion to said supporting frame, means connected directlybetween said narrow extension and the forward portion of said miningmachine Vlr'or supporting the latter in an elevated position on saidextension, and mechanism -for adjusting the elevation of the forwardportion of said mining machine.

3. The combination with a supporting Ytrame having a lower forwardextension, of a mining machine pivotally connected to said supportingframe and extending forwardly over said extension, an auxiliary supportconnected to said mining machine, and a slidable connection between saidauX- iliary support and said forward extension.

4l. The combination with a supporting frame comprising upright spacedapart standards and a lower forward extension adapted to occupy aposition substantially at the floor of a mine chamber, of aminingmachine pivotally connected at its rear end portion between saidstandards and extending forwardly over said extension, an uprightstandard connected between the forward lower portion of said miningmachine and the forward upper side of said eXtension. and means foradjusting said mining machine on said upright standard relatively tosaid forward extension and moving said mining machine about its pivotalsupport as an axis.

The combination with a supporting frame comprising spaced apart'ujlnigi'it standards and a lower forward extension, of a mining machinepivotally connected at its rear end portion between said uprightstandards and extending forwardly above said extension, means forsupporting said mining machine above said forward eXtension, saidlast-named supporting means being connected between the forward endportion of said extension and the bottom side of said mining machineintermediate its ends, and means associated with said last namedsupporting means below the top of the mining machine for lifting andlowering the forward end of said mining machine while the rear portionthereof is supported by said pivotal connections to said uprightstandards.

6. The combination with a supporting frame having a forward extensionadapted to rest on the floor of a mine chamber, a mining machinepivotally connected at its rear end portion to said supporting iframeand extending forwardly therefrom over said extension, and asupplemental support for said mining machine pivotally and slidablyconnected to said extension.

7. The combination with a supporting frame having a forward extensionextending over the mine floor and along the same, of a mining machinepivotally connected at its rear end portion to said supporting frame, asupplemental' support for said mining machine, a slide block pivotallyconnected to the lower end of said supplemental support, and means forguiding said slide block forwardlyV and rearwardly on the forward endportion of said extension while preventing lateral increment ol saidsupplemental support relatively to said extension.

8. The combination with a supporting frame comprising spaced apartupright standards and a forward central extension` of means foranchoring said supporting frame between the floor and roof of a minechamber with said extension projecting forwar-diy over the mine floor, amining machine pivotally connected at its rear end portion between saidupright standards and extending forwardly along said extension and above'the same` an ujn-ight standard connected between the forward endportion of said extension and the lower side of said mining machineintermediate its ends, and means associated with such upright standardfor adjusting the elevation of said mining machine while being pivotallysupported at its rear end by the pivotal connection in said spaced apartstandards and while being supported at its forward portion by saidupright standard.

9. ln a mining and loading machine, the combination with a supportingframe, of a conveyer pivotally connected to Said supporting trame inposition to extend into a mine car on a mine track while said supporting` trame is adapted to swing angularly to various adjusted positionson the mine floor, a supplemental trarne mounted on said supj'iortingtrame to extend in a general horiaontal direction in a mine chamberbetween the floor and root thereof, cutting mechanism mounted on thcforward portion of said supplemental trame in position tor op crating onthe upright mine Wall between said tloor and root, and mechanism fordelivering cut material trom the mine Wall to said conveyer in thevarious positions to which said supporting trame is adjusted on the minefloor While said conveyor remains inposition to deliver material to amine car on the same mine track.

l0. The combination with supporting trame-Work approximately circular inplan, ot core cutting mechanism mounted on said framework, means toroperating said core cuttinfr mechanism to cut crescent-shaped cores troma mine Wall adjacent said trameivoi'k in a geiieral horimiitaldirection. said framework and said cutting mechanism being readilyshittable to vary the direction ot the movement of the cutting mechanismtek a new position, a conveyor connected to said framework tor movementhorizontally about one end oli' said conveyer to various angularpositions relatively to said tramework, and mechanism tor delivering theout material to the conveyor in, its various angie lar positionsrelative to said framework.

l1. The combination with a supporting traine adapted to rest on thefloor o'lI a mine chamber, of a supplemental trame mounted on` theforward portion ot said supporting 'lrame and extending` :forwardlytheretrom, said supplemental trame being approximately circulaiin plan,of core cutting` inmehauism mounted on said supplemental trame, meansfor operating said core cut-- ting; mechanism to cut a crescent-shapedcore oli material trom a mine Wall iny a general horizontal direction,means tor transferring the core ot material from. the mine Wall alongsaid supplemental trame over the rear discharge end thereot, and aconveyor pivotallyi connected to the rear portion ot said supporting1trame Yfor angular adjustment horizontally relative to said supportingiframe Without altering its receiving position relative to the dischargeend ot said supplemental trame.

l2. In combination, miningmachine head, a loop core cutter carried bysaid head tor movement about an upright axis, anv

arcuate table, means for moving said table in the kerf formed by saidcutter, and means for reciprocating said table to` transfer materialsevered by said cutter While said table remains in position in the cutmade-by said cutter.

lil. ln combination, a mining machine traine, a cutter head carried bysaid trame, :i loop core cutter carried by said cutter head tor rotationabout an upright axis, an arcuate table ot less extent angularly thanthe ai'igular rotation ot said cutter' during a cutting operation, andmeans for operating said table relatively to said cutter to remove thematerial severed by said cutter a part at a time.

ist. ln combination, a miningmachine frame, a cutter head having a loopcore cutter carried by said trame, an arcuate carrior having an angularextension oli less than i800, and means tor moving said carrierindependently ot the movement ol said cutter including movement ol. thecarrier into the lferl" termed by said loop cutter to receive a load olmaterial.

l5. In combination, a mining machine iframe, a cutter head having a loopcore cut t r carried by said cutter head and movable into the kei-tFormed by said loop cutter, and means tor in'ipartingv shortreciprocations to said table relative to said cutter head.

16. In combination, a mining machine trame having a cutter head providedWith a loop cutter, a table tor receiving material severed byi saidcutter, links for movably securing said table to said cutter head, andmeans it'or imparting short reciprocatory movements 'to said table, themovements of said table in one direction being comparatively rapid andin the other direction comp aratively slow.

l?. ln combination, a mining machine iframe, a cutter head carried bysaid frame, core cutting mechanism carried by said cutte head, means torreceiving material disconnected by said severing mechanism, saidreceiving` means being arranged to transport said material While saidmeans remains in receiving position.

18. In a mining machine, the combination with a supporting trame, oitcore cutting mechanism having an unobstructed core opening therethrough.and mounted on said trame lor arcuate movement relatively thereto on anupright axis, means for operatingr said core cutting mechanism includingarcuate feeding movement thereof on such upright axis While said frameremains in stationary position to effect the cutting of a core in ageneral horizontal direction, a device mounted on said frame 'formovement relatively thereto in position to extend into the kert formedby said cutter for receiving the core material, and means tor operatingsaid device While in receiving position for transporting the materialreceived thereon.

19. In combination, a mining machine frame, a loop core cutter carriedby said frame for rotation albout an upright axis, a device forreceiving material severed byy said carried by said trame, an arcuatetabley v IQ cutter, means for moving said device into the kerf formed bysaid cutter during a cutter operation thereof, and means for operatingsaid device While in receiving position for transferring` materialreceived thereon.

20. ln combination, a mining' machine frame, a cutter head carried bysaid frame for rotation about an upright axis, a loop core cuttercarried by said cutter head, an arcuate table carried by said cutterhead and having its forward end positioned adjacent the rear portion ofsaid loop cutter, and means for imparting a reciprocatory` movement tosaid table relatively to said clutter head to transfer material receivedon said table.

Qi. ln a mining;- machine, the combination with a supporting frame, ofmechanism mounted. thereon for movement relatively thereto to dislodgematerial from an upright mine Wall, `a. ring sector plate mounted onsaid frame for movement relatively thereto with its upper surface in agenerally horizontal position to receive the severed material and carrythe same by gravity on such upper surface, and means for operating saidsector plate for transferring` severed material toward loading' positionWhile said plate remains in receiving position.

22. In a mining' machine. a cutter, means for operating said cutter tosever material from its native bed, a table for receiving,v the materialso severed, means for rotating said table and said cutter about a commonaxis, and means for imparting a reciprocatory movement to said tableindependent of said rotation about said axis.

23. ln combination, a mining machine fi'ame, a cutter mounted on saidframe for rotation about an upright axis, an arcuate table, means formoving said table about the axis of said cutter into the lrerf formedthereby, and means for imparting a reciprocatory movement to said tableindependent of said. rotation about said axis to operate said table totransfer material thereon while said table remains in positionadjacei'it said cutter.

24T. ln a mining machine, a cutter head rotatable about an upright axis,severing' mechanism carried by said cutter head, a table for receivingrmaterial disconnected by said severing' mechanism from its native lied,links connecting said table to said cutter head to permit said table toreciprocate relative to said cutter head, and mechanism for impartingl arapid movement of said table relative to said cutter head tovvard saidsevering' mechanism, and a slower movement of said table in an oppositedirection.

25. In combination, a supporting frame, a cutter head cari'ied by saidframe for rotation about an upright axis, a cutter secured to saidcutter head for rotation therewith,

an arcuate table carried by said cutter head, and having` its forwardend positioned ad jacent to the rear portion of said cutter', linksconnecting,` said table with said cutter head and arranged to permitreciprocatory movement of said table relative to said cutter head, andmechanism for operating said table and arranged to impart a rapidmovement of said table toward said cutter and a slower movement to saidtable in an opposite direction.

26. In a mining machine, the combination of a core cutter having asingle cutter frame with an unobstructed core opening therethrough, anda plurality of spaced apart plane kerf cutters carried by said frame inposition to assist said core cutter in cutting a core extendingtliroughsuch unobstructed core opening` and through the space between saidspaced apart plane lrerf cutters.

ln a mininI machine, a loop cutter comprising a U-shaped frame, a cutterchain carried by said frame for severing material along the exteriorportion of said frame, and separate cutter chains for forming a lrerffor the inward and outward runs of said first mentioned chains.

28. In a mining` machine, a loop core cutter comprising' a frame movableabout a central axis, a cutter chain for formino' a kerf at a por-'tionof said frame removed from said axis,and a separate chain for formingakerf extending away from said axis toward said exterior portion of saidframe.

29. ln a mining machine, a loop cutter comprising' a Ushaped framemovable about a central axis, a cutter chain for severing material alongthe portion of said frame removed from said axis, and separate cutterchains for severing' material along the portion of said frame extendingrbetween said axis and said removed portion.

30. In a mining machine, the combination with a cutter frame having` anunobstructed core opening therethrough, of a chain cutter mounted onsaid cutter frame to travel around said unobstructed core opening' tiansversely of the direction of' feed of said cutter frame, and spacedapart chain cutters mounted on said cutter frame to travel about spacedapart portions thereof in spaced apart planes parallel to the directionof feed of said cutter frame.

3l. In a mining machine, a loop cutter comprising' a U-shaped framemovable about a central axis, a cutter chain for severing' materialalong,` the portion of said frame rel moved from said axis, and separatecutter chains for forming lrei'fs .in which the inward and outward runsof said first mentioned chain move.

32. In a mining machine, a cutter frame provided with a cutter armhaving` a slot lll) therein, a cutter chain carriedby said arm inposition to form a kerl: therefor, and a `second cutting mechanismincluding a cutter I carried by said arm and extending angularlytherefrom, and a second cutti ng mechanism including a cutter chainn'iovablev along said guide-bar duringa portion oi" its travei 'andmovable .in thel kort formed by `said `iii-st core cutter mounted onsaid trame and hai'- cutter chain during another yportion oi'its travel.

Saa In :L n'iining ifnachiine, a cutter -coinprising a single trame, aplurality ot chains carriedfbyfsaid iframe andso lai-ranged that Ione ofsaid chains travelsin the plane of vcutter carried by said trame andarranged to form a kerf inf which said chainianoves yduring a portionof-its travel.

36. In' a mining machine, a rloop cutter `comprising a trame, a pair ofarms ln'Lving 4slots therein and a bar-connecting said arms, a cutterchain movable along said `bar tor forming a `kertin material to be minedbut movable inthe slots in said arms during a portion of its run, andindependent `cutter cha-ins forforming lerfs tor said arms.

37. vIn a miningmachine, a loop :eut-ter `comprising a cutterftramehaving ysubstantially parallel` arms connected at their outer endsby a guidebar, 'a cutter chain moyal'ile along sai d connectingguide-bar loi' toi-nung a-l hert-in materialto be severed and`n'ioval'ile in slots in said armstoward and away from said guide`bar,-and independent entier chains carried `by said arms tor 'toi-mingker'fs in said material througlr which said arms may move.

38. In a mining n'lacaine, the combilmtion with cutting mechanism, ot :L-hase plate 'for receivingcut imLtcriahand aresiliently movable`extension 'for usaid base plate arranged to contact with the wall ot amine chamber to make close `connectimi between said Wall and said baseplate.

39. In mining- 1nacliinetl1e combination with cutting` mechanism, ot aplatform tor receiving cut material, an extension'carried by saidlplatform iter sliding movement relative thereto, and a spring :torholdingsaid extensionresilicntly in contact with the wall of the minechamber.

40. In a mining machine,fthe combination with cutting mechanism, of aplatform having an arcuate periphery, an extensionl plate fitted tosz'Lidpei-iphery and Iarrangedl'to contactwith the wallet' a-minechamber, andy resilient means for yforcing saidl extension plateinto'contactwith said wall.

41., In a mining machine, a platform-.having a groove in thev peripherythereof, an extension plate supported in said groove ft'orcontactingwith the wall o'lithe mine chamber, and a spring-fororcingsaid extension plate into contact with the wall o't :saidchan'iber.

42.'. VIn. a mining machine, the combination with.v asupportingi?i'aine, of a loop chain ing an unobstructed core `opening'therethrough, a plane korf cutter associatedi with. the lowcr'run otsaid loop Achain core cutter,

iandf'ineans .mounted onfsaid trame inposi- Amechanism ishavingfnanunobstructed core opening therethrough. and'mounted `on said traimei.for swinging feeding movement on an `upright L axis, loading apparatusfor transferring the :cut core material from ythe mine wall ytowardylloading position,fvsaid loading apparatus comprising a ringfsectorplate mounted @on -saidframe imposition to `extend underfthe`eorermaterial, andi a conveyor onsaid `frame travelingover.` a position:adjacent thef'lower inner portion ot said 'core' cutting mechanism forreceiving the cuttings from the latter` duringfits arcuate' ieedine"movement about the :said u3- right axis and transfer such cuttings away`from thev mine" wall.

"-flt. In a mining machine, the combination with a supporting' vframecomprising` a platform, of loop chain core cutting Imeclmnism mounted onsaid'iramewith its lower" run taveling toward said platiiorni andadjacent the Yforward end thereof, a plane hert cutter associated 'withsaid lower run, and a conveyor movable over said platform to remove thccuttings deposited-hy said loop chain core cutting mechanism and by saidplane kert cutter and transfer such cuttings toward the rear portion ofsaid support-ing frame.

45. In a mining machine, the Lcombination with a supporting frame, otlcore cutting mechanism havingl an unobstructed corel openingtherethrough `and mounted on said iframe in position to cut a singlecore extending in a generally horizontal direction through saidunobstructed core opening, a plane .hert cutter associated with saidL'core cutting mechanism, and a conveyorinounted on said iframe invposition to receive the cuttings from' said core cutting mechanism and.trom said plane hert cutter and transfer such cuttings toward loadingposition.

e6. In a mining` machine, the combination with a supporting trame, of abase plate mounted thereon, a standard mounted on said base plate,cutting mechanism carried by said standard, a supporting screw for saidstandard, an adjustable nut carried by said sere-iv and arranged tosupport said standard and said base plate, and means mounted on saidsupporting` frame for holding said base plate and said standard tromtipping relatively to said sup porting frame.

4f?. In a mining machine, a Jframe, means for pivotally supporting said'trame at one end thereof, a circular plate rotatably mounted in said,trame at the other end thereo'l, cutting mechanism carried by saidplate, a standard connected with said plate, and means tor adjustingsaid plate and cutting mechanism on said standard.

4128. In a mining machine, a circular plate, a frame carried by saidplate, severing mechanism mounted on said frame, a standard forsupporting said trame and severing mechanism, means for adjusting said'trame along said standard, means for rotating said 'frame relative tosaid 'standard, and means for cooperating with said plate topreventtipping of said trame and severing mechanism.

di). In a mining machine, a frame pivotally supported at oneend-thereof, a circula guideu'ay at the opposite end ot said traine, aplate rotatably mounted in said guideway, frame members secured to saidplate, severing mechanism carried by said trame members, a Standardprojecting through said plate and connected with said trame members, andmeans connected with said standard for adjusting said severingineehanisi'n along said standard and tor rotating said severingmechanism about said standard as an axis.

50. In a mining machine, the combination with a cutter trame, oiE achain cutter mounted on a portion of said cutter trame to travel aroundthe same in position to cut a plane hert in a mine Wall, an additionalchain cutter mounted on said trame to travel about another portionthereof hav ing an unobstructed core opening extending therethrough,means comprising a. drive wheel mounted for rotation on a horizontalaxis to actuate said core chain cutter, mechanism comprising a diiveWheel mounted tor rotation about an upright axis to actuate said planekert cutter, ieans tor controlling the actuation of each ot' said chaincutters independently ot the other, a. supporting trame for theaforesaid parts, and means ilor ellecting teeding movement ot saidi'irst named Ytraine during the actuation ot said chain cutters to causesaid chain cutters to cut a core oi? material in a mine Wall in ageneral horizontal direction.

5l. In a mining machine, the combination with a, supporting frame, of achain cutter drive wheel mounted on said frame tor rotation about ahorizontal axis, a pair ot' chain cutter drive wheels mounted in spacedapart relation on said frame for rotation about a common upright axis,three chain cutters connected respectively to said drive Wheels foractuation thereby, and a, cutter frame common to said chain cutters forguiding the latte-r tor actuation by the respective drive Wheels. saidcommon cutter 'trame having an unobstructed core opening therethrough,and means for operating` said chain iuttei's including teeding movementot said common cutter frame and actuation ot said chain cutters by meansot said drive Wheels to effect the cutting ot a core of materialextending through said unobstructed core opening.

52. In a mining machine, the combination With a cutter head, ot a corecutter carried by said cutter head and comprising a trame, a chainguided on said frame in an upright loop having an unobstructedcore-opening therethru, a second chain in the plane of a predeterminedrun of said lirst named chain and surrounding such predetermined run,and means for operating said chains.

53. In a mining machine, a cutter head, a loop cutter tor said cutterhead comprising an upright rectangular frame member, a cutter chainguided in an upright loop about said frame member, independent cutterchains guided in horizontal loops on the upper and lower portions otsaid frame member, and drive Wheels toioperating said cutter. i

541i. In a mining machine, a cutter head provided with a loop corecutter comprising a substantially rectangular closed trame member havingan unobstructed core openA ing therethrough, and a plurality ot endlesschain cutters carried by said trame member and arranged to travel inplanes arranged iii different angular positions relative to one another.

55. In a mining machine the combination a cutter head, of a core cuttermounted on said cutter head and comprising spaced apart plane korfcutters and an intermediate loop chain cutter having an unobstructedcore-opening therethru, and means tfor operating said core cutter.

56. In a mining machine, a cutter head. a. loop cutter for said cutterhead provided with a cutter frame, endless chain cutters carried by saidcutter traine and arranged in planes substantially at right angles toone another, drive Wheels tor said cutter chains. and means `torchanging tho position of said lll() cutter-frame relative to said cutterheadv for adjusting the tensioninsome ofsaid cutter chains. i

57. In a mining machine, the combination with.A asupporting' fframe,l ofaminingmachine iframe'pivotallysupported at one end thereofonsaidsupporting frame, a standard/projecting upwardly from theiforwardportion-of'said support-ing` frame, a cutter head, means for supportingsaidfcut-ter head on said upwardly projecting standard for adjustmentvertically Eon. said i standard, iand `.means `torconnectinghsaid cutterhead-.to

said mining vmachine frame for holding `said ycutter head from tippingyrelatively to said mining Amachine frame.

58. In combinatioma mining machine frame, means for pivotally fsupporti-ngwsaid vtrame at one endthcreot, a cutter head loi cated attheend of said frame opposite said `.pivotal support, an upright,standard.,fmeans for supporting'said cutterwheadV on said v.standard-means for`adjustiing said cutter frame,v a cuttter vhead rotatably secured to-said mining ymachine frame, an upright `sleeveforn'iing part offsaiidcutter head, a supportingstandard positioned in rsaid sleeve, a nutcarried `by said `standard for supporting` said sleeve, vmeans forrotating said `nutrelativeto :said vstandard for Aadvj-ustingwsaidsleeve and cutter head vertiically, means for' securing 1 saidv nutagainst vrotation .-relative -to` said standard and means cooperatingwith said nut forfiiotatl:ing -.said `cutter head -vrelative to Lsaidstandard.

GO. In combinatiom: aizmining umachine frame, means foi-]'iivotally:supporting said .frame at one end'thereof, a cutter :head carried' bysaid `finu'ie'at thc other end'tl'uxreof andv rotatably secured thereto,a standard for lsupportingsaid cutter head, a sleeve `carried byvsaidnutten head in which said standard -isfpositioneth a nut?threadedonsaidstandard, means for rotating said nut to `adj-ust saidcutterheadivertical-ly along` said standard, Aand means for holding said= nutagainst rotation t0 causesaid cutterrhead to-rotate in sa=idmining:machine yframe and about said standard :as an aXis.

6l. In a vmining machinepthe eonibination with a base frame havingrigidly connected thereto a forward extension adapted to be locatedsubstantially. onthetloor of a mine chamber, of vmeans for engaging theroof of a mine chamben for holding said base frame including. saidiforward` extensionv firmly in adjusted. posit-ion, a main vfnameadjustably mounted onsaid .base ,frame,.cutting apparavtus=mountedjonsaid main frame and-,mov-

able -bodily up and; down therewith, means mounted directly on saidforward extension` imposition to 'support' the forward` portion ofisaidmain fname and the cutting apparatus, and mechanism for adjusting the.height ofsaid cutting appanatus.

62. In. a .mi-ning machine, lthe combinationwithy a base frame having`awforward extension and upright standards, of a main frame vpivotablyand slidably y connected :to said` upright standards, cutting.,apparatus carried by the.forwarfdwportion of saidl main fname a supportvfor the forwardportion of said main frame, a pivotal andslidable4connection between i said last-married support tion .with `cuttingapparatus, ofsupporting frame-work. therefor,.-means comprising ascrew-threaded standard` and. a-.circular nut thereon for. adjusting`the/position `ofisaid cutting n apparatus; .means for locking said -nut1onsaid standard' to` prevent the nut from turning` andto hold thecutting` apparatus in adjustediposition .andI `feed gearing associatedwith said min-saidvfeed gearingbeing made operative bythelocking ofsaidwnut to ,effect the feed= of said cutting apparatus.

(35. In aminingmachine, the combination with a plurality of spaced.apart parallel korf cutters, Aof `an intori'nediate .looped chain corecutter havingfuppeu andvlower runsrespectively.within the boundaries of'saidskerf cutters, and means :for operating;l including thefeed of said.kerf cutters :and said|` looped Achain core cutter.

' (5G.l In auniningamaehine, the combination with a main frame, of asupplemental fra-me pivotally mounted von y said rmain frame, spacedapart plane lrerf cutters,an

intermediate loop chain core cutter having an unobstructedcore openingtherethrough, means forwsupporting said plane kerf cutters and saidintermediate loop chain ieore cutterin position to cooperate with eachother-in cutting` a core of material entending through said`unobstructed coreopening `and :through the space ibetween said spacedyapart vplanerkerf cutters, and means for operating said planekerfcutters and said loop chaincane cutter `including swingflll)

